Difference between revisions of "Betula michauxii"
Ann. Sci. Nat., Bot., sér. 2, 15: 195. 1841.
Common names: Newfoundland dwarf birch Michaux's birch bouleau de Michaux
Endemic
Synonyms: Betula terra-novae Fernald
Treatment appears in FNA Volume 3.
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GeoffLevin (talk | contribs) m (Fixed Nfld. and Labr. distribution to match map in printed version.) |
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|name=Betula terra-novae | |name=Betula terra-novae | ||
|authority=Fernald | |authority=Fernald | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Betulaceae;Betulaceae subfam. Betuloideae;Betula;Betula michauxii | |hierarchy=Betulaceae;Betulaceae subfam. Betuloideae;Betula;Betula michauxii | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> spreading, dwarfed, to ca. 0.5 m. <b>Bark</b> dark brown, smooth, close; lenticels pale, inconspicuous, circular. <b>Twigs</b> without taste and odor of wintergreen, moderately to densely pubescent, not conspicuously resin-coated, without large, warty, resinous glands. <b>Leaf</b> blade obovate–reniform, with 2–3 pairs of lateral veins, 0.5–1 × 0.5–1.2 cm, base cuneate, margins deeply crenate-dentate, apex broadly rounded to nearly truncate; surfaces abaxially usually glabrous. <b>Infructescences</b> erect, short-cylindric, 0.5–1 × 0.5–0.8 cm, shattering with fruits in fall; scales unlobed (lateral lobes sometimes present but greatly reduced), glabrous. <b>Samaras</b> with wings not apparent or reduced to narrow ridges.</span><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
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|habitat=Sphagnum bogs, around pools, and wet peaty meadows | |habitat=Sphagnum bogs, around pools, and wet peaty meadows | ||
|elevation=0–700 m | |elevation=0–700 m | ||
| − | |distribution=St. Pierre and Miquelon;Nfld.;N.S.;Que. | + | |distribution=St. Pierre and Miquelon;Nfld. and Labr.;N.S.;Que. |
| − | |discussion=<p>This infrequent dwarf birch is distinguished from Betula nana mostly on the basis of its reduced infructescence scales and wetter habitat (J. J. Furlow 1984), characteristics that are also occasionally noted in B. nana. It perhaps might better be treated as a race of that species; in the absence of thorough study of this complex, however, it seems best to follow the traditional treatment (M. L. Fernald 1950c; J. Rousseau and M. Raymond 1950).</p> | + | |discussion=<p>This infrequent dwarf birch is distinguished from <i>Betula nana</i> mostly on the basis of its reduced infructescence scales and wetter habitat (J. J. Furlow 1984), characteristics that are also occasionally noted in <i>B. nana</i>. It perhaps might better be treated as a race of that species; in the absence of thorough study of this complex, however, it seems best to follow the traditional treatment (M. L. Fernald 1950c; J. Rousseau and M. Raymond 1950).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Betula michauxii | name=Betula michauxii | ||
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|authority=Spach | |authority=Spach | ||
|rank=species | |rank=species | ||
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|habitat=Sphagnum bogs, around pools, and wet peaty meadows | |habitat=Sphagnum bogs, around pools, and wet peaty meadows | ||
|elevation=0–700 m | |elevation=0–700 m | ||
| − | |distribution=St. Pierre and Miquelon;Nfld.;N.S.;Que. | + | |distribution=St. Pierre and Miquelon;Nfld. and Labr.;N.S.;Que. |
|reference=None | |reference=None | ||
|publication title=Ann. Sci. Nat., Bot., sér. | |publication title=Ann. Sci. Nat., Bot., sér. | ||
|publication year=1841 | |publication year=1841 | ||
|special status=Endemic | |special status=Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_120.xml |
|subfamily=Betulaceae subfam. Betuloideae | |subfamily=Betulaceae subfam. Betuloideae | ||
|genus=Betula | |genus=Betula | ||
|species=Betula michauxii | |species=Betula michauxii | ||
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-->[[Category:Treatment]][[Category:Betula]] | -->[[Category:Treatment]][[Category:Betula]] | ||
Latest revision as of 14:14, 29 February 2024
Shrubs, spreading, dwarfed, to ca. 0.5 m. Bark dark brown, smooth, close; lenticels pale, inconspicuous, circular. Twigs without taste and odor of wintergreen, moderately to densely pubescent, not conspicuously resin-coated, without large, warty, resinous glands. Leaf blade obovate–reniform, with 2–3 pairs of lateral veins, 0.5–1 × 0.5–1.2 cm, base cuneate, margins deeply crenate-dentate, apex broadly rounded to nearly truncate; surfaces abaxially usually glabrous. Infructescences erect, short-cylindric, 0.5–1 × 0.5–0.8 cm, shattering with fruits in fall; scales unlobed (lateral lobes sometimes present but greatly reduced), glabrous. Samaras with wings not apparent or reduced to narrow ridges.
Phenology: Flowering late spring.
Habitat: Sphagnum bogs, around pools, and wet peaty meadows
Elevation: 0–700 m
Distribution
St. Pierre and Miquelon, Nfld. and Labr., N.S., Que.
Discussion
This infrequent dwarf birch is distinguished from Betula nana mostly on the basis of its reduced infructescence scales and wetter habitat (J. J. Furlow 1984), characteristics that are also occasionally noted in B. nana. It perhaps might better be treated as a race of that species; in the absence of thorough study of this complex, however, it seems best to follow the traditional treatment (M. L. Fernald 1950c; J. Rousseau and M. Raymond 1950).
Selected References
None.
Lower Taxa
None.